United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "September 1974," Business Conditions Digest (September 1974) : 2-2. https://fraser.stlouisfed.org/title/43/item/7337/toc/139675 , accessed on May 16, 2024.
United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "September 1974," Business Conditions Digest (September 1974) : 2-2. https://fraser.stlouisfed.org/title/43/item/7337/toc/139675 , accessed on May 16, 2024.